Our Oring Gauge is a great gadget to have around. Its easy to use to determine the size of almost any British Standard size Oring. Smaller section sizes can be identified by using the silhouettes down the side of the gauge. You can measure larger sizes by placing the Oring around the two halves of the appropriate spindles at the top of the gauge. The slide is then extended until it is taut and the BS size number is displayed in one of the small windows near the top of the main body.

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